/* Generic symbol file reading for the GNU debugger, GDB.
- Copyright 1990, 1991, 1992, 1993 Free Software Foundation, Inc.
+ Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1998
+ Free Software Foundation, Inc.
Contributed by Cygnus Support, using pieces from other GDB modules.
This file is part of GDB.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
-Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#include "defs.h"
#include "symtab.h"
#include "language.h"
#include "complaints.h"
#include "demangle.h"
+#include "inferior.h" /* for write_pc */
+#include "gdb-stabs.h"
+#include "obstack.h"
-#include <obstack.h>
#include <assert.h>
-
#include <sys/types.h>
#include <fcntl.h>
-#include <string.h>
-#include <sys/stat.h>
+#include "gdb_string.h"
+#include "gdb_stat.h"
#include <ctype.h>
+#include <time.h>
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
#ifndef O_BINARY
#define O_BINARY 0
#endif
-/* Global variables owned by this file */
+#ifdef HPUXHPPA
+extern int hpread_pxdb_check PARAMS ((bfd *, char *));
+
+/* Some HP-UX related globals to clear when a new "main"
+ symbol file is loaded. HP-specific. */
+extern int hp_som_som_object_present;
+extern int hp_cxx_exception_support_initialized;
+#define RESET_HP_UX_GLOBALS() do {\
+ hp_som_som_object_present = 0; /* indicates HP-compiled code */ \
+ hp_cxx_exception_support_initialized = 0; /* must reinitialize exception stuff */ \
+ } while (0)
+#endif
+
+int (*ui_load_progress_hook) PARAMS ((char *, unsigned long));
+void (*pre_add_symbol_hook) PARAMS ((char *));
+void (*post_add_symbol_hook) PARAMS ((void));
+
+/* Global variables owned by this file */
int readnow_symbol_files; /* Read full symbols immediately */
struct complaint oldsyms_complaint = {
extern int info_verbose;
+extern void report_transfer_performance PARAMS ((unsigned long,
+ time_t, time_t));
+
/* Functions this file defines */
-static void
-set_initial_language PARAMS ((void));
+#if 0
+static int simple_read_overlay_region_table PARAMS ((void));
+static void simple_free_overlay_region_table PARAMS ((void));
+#endif
-static void
-load_command PARAMS ((char *, int));
+static void set_initial_language PARAMS ((void));
-static void
-add_symbol_file_command PARAMS ((char *, int));
+static void load_command PARAMS ((char *, int));
-static void
-cashier_psymtab PARAMS ((struct partial_symtab *));
+static void add_symbol_file_command PARAMS ((char *, int));
-static int
-compare_psymbols PARAMS ((const void *, const void *));
+static void add_shared_symbol_files_command PARAMS ((char *, int));
-static int
-compare_symbols PARAMS ((const void *, const void *));
+static void cashier_psymtab PARAMS ((struct partial_symtab *));
-static bfd *
-symfile_bfd_open PARAMS ((char *));
+static int compare_psymbols PARAMS ((const void *, const void *));
-static void
-find_sym_fns PARAMS ((struct objfile *));
+static int compare_symbols PARAMS ((const void *, const void *));
+
+bfd *symfile_bfd_open PARAMS ((char *));
+
+static void find_sym_fns PARAMS ((struct objfile *));
+
+static void decrement_reading_symtab PARAMS ((void *));
+
+static void overlay_invalidate_all PARAMS ((void));
+
+static int overlay_is_mapped PARAMS ((struct obj_section *));
+
+void list_overlays_command PARAMS ((char *, int));
+
+void map_overlay_command PARAMS ((char *, int));
+
+void unmap_overlay_command PARAMS ((char *, int));
+
+static void overlay_auto_command PARAMS ((char *, int));
+
+static void overlay_manual_command PARAMS ((char *, int));
+
+static void overlay_off_command PARAMS ((char *, int));
+
+static void overlay_load_command PARAMS ((char *, int));
+
+static void overlay_command PARAMS ((char *, int));
+
+static void simple_free_overlay_table PARAMS ((void));
+
+static void read_target_long_array PARAMS ((CORE_ADDR, unsigned int *, int));
+
+static int simple_read_overlay_table PARAMS ((void));
+
+static int simple_overlay_update_1 PARAMS ((struct obj_section *));
+
+void _initialize_symfile PARAMS ((void));
/* List of all available sym_fns. On gdb startup, each object file reader
calls add_symtab_fns() to register information on each format it is
static struct sym_fns *symtab_fns = NULL;
-/* Structures with which to manage partial symbol allocation. */
-
-struct psymbol_allocation_list global_psymbols = {0}, static_psymbols = {0};
-
/* Flag for whether user will be reloading symbols multiple times.
Defaults to ON for VxWorks, otherwise OFF. */
int symbol_reloading = 0;
#endif
+/* If non-zero, then on HP-UX (i.e., platforms that use somsolib.c),
+ this variable is interpreted as a threshhold. If adding a new
+ library's symbol table to those already known to the debugger would
+ exceed this threshhold, then the shlib's symbols are not added.
+
+ If non-zero on other platforms, shared library symbols will be added
+ automatically when the inferior is created, new libraries are loaded,
+ or when attaching to the inferior. This is almost always what users
+ will want to have happen; but for very large programs, the startup
+ time will be excessive, and so if this is a problem, the user can
+ clear this flag and then add the shared library symbols as needed.
+ Note that there is a potential for confusion, since if the shared
+ library symbols are not loaded, commands like "info fun" will *not*
+ report all the functions that are actually present.
+
+ Note that HP-UX interprets this variable to mean, "threshhold size
+ in megabytes, where zero means never add". Other platforms interpret
+ this variable to mean, "always add if non-zero, never add if zero."
+ */
+
+int auto_solib_add = 1;
+
\f
/* Since this function is called from within qsort, in an ANSI environment
it must conform to the prototype for qsort, which specifies that the
DESCRIPTION
- Given pointer to two partial symbol table entries, compare
- them by name and return -N, 0, or +N (ala strcmp). Typically
- used by sorting routines like qsort().
+ Given pointers to pointers to two partial symbol table entries,
+ compare them by name and return -N, 0, or +N (ala strcmp).
+ Typically used by sorting routines like qsort().
NOTES
const PTR s1p;
const PTR s2p;
{
- register char *st1 = SYMBOL_NAME ((struct partial_symbol *) s1p);
- register char *st2 = SYMBOL_NAME ((struct partial_symbol *) s2p);
+ register char *st1 = SYMBOL_NAME (*(struct partial_symbol **) s1p);
+ register char *st2 = SYMBOL_NAME (*(struct partial_symbol **) s2p);
if ((st1[0] - st2[0]) || !st1[0])
{
}
else
{
- return (STRCMP (st1 + 2, st2 + 2));
+ /* Note: I replaced the STRCMP line (commented out below)
+ * with a simpler "strcmp()" which compares the 2 strings
+ * from the beginning. (STRCMP is a macro which first compares
+ * the initial characters, then falls back on strcmp).
+ * The reason is that the STRCMP line was tickling a C compiler
+ * bug on HP-UX 10.30, which is avoided with the simpler
+ * code. The performance gain from the more complicated code
+ * is negligible, given that we have already checked the
+ * initial 2 characters above. I reported the compiler bug,
+ * and once it is fixed the original line can be put back. RT
+ */
+ /* return ( STRCMP (st1 + 2, st2 + 2)); */
+ return ( strcmp (st1, st2));
}
}
/* Sort the global list; don't sort the static list */
qsort (pst -> objfile -> global_psymbols.list + pst -> globals_offset,
- pst -> n_global_syms, sizeof (struct partial_symbol),
+ pst -> n_global_syms, sizeof (struct partial_symbol *),
compare_psymbols);
}
}
}
-void
-sort_all_symtab_syms ()
-{
- register struct symtab *s;
- register struct objfile *objfile;
-
- for (objfile = object_files; objfile != NULL; objfile = objfile -> next)
- {
- for (s = objfile -> symtabs; s != NULL; s = s -> next)
- {
- sort_symtab_syms (s);
- }
- }
-}
-
-/* Make a copy of the string at PTR with SIZE characters in the symbol obstack
- (and add a null character at the end in the copy).
- Returns the address of the copy. */
+/* Make a null terminated copy of the string at PTR with SIZE characters in
+ the obstack pointed to by OBSTACKP . Returns the address of the copy.
+ Note that the string at PTR does not have to be null terminated, I.E. it
+ may be part of a larger string and we are only saving a substring. */
char *
obsavestring (ptr, size, obstackp)
struct obstack *obstackp;
{
register char *p = (char *) obstack_alloc (obstackp, size + 1);
- /* Open-coded memcpy--saves function call time.
- These strings are usually short. */
+ /* Open-coded memcpy--saves function call time. These strings are usually
+ short. FIXME: Is this really still true with a compiler that can
+ inline memcpy? */
{
register char *p1 = ptr;
register char *p2 = p;
return p;
}
-/* Concatenate strings S1, S2 and S3; return the new string.
- Space is found in the symbol_obstack. */
+/* Concatenate strings S1, S2 and S3; return the new string. Space is found
+ in the obstack pointed to by OBSTACKP. */
char *
obconcat (obstackp, s1, s2, s3)
return val;
}
+/* True if we are nested inside psymtab_to_symtab. */
+
+int currently_reading_symtab = 0;
+
+static void
+decrement_reading_symtab (dummy)
+ void *dummy;
+{
+ currently_reading_symtab--;
+}
+
/* Get the symbol table that corresponds to a partial_symtab.
This is fast after the first time you do it. In fact, there
is an even faster macro PSYMTAB_TO_SYMTAB that does the fast
/* If it has not yet been read in, read it. */
if (!pst->readin)
{
+ struct cleanup *back_to = make_cleanup (decrement_reading_symtab, NULL);
+ currently_reading_symtab++;
(*pst->read_symtab) (pst);
+ do_cleanups (back_to);
}
return pst->symtab;
else
{
/* Examination of non-executable.o files. Short-circuit this stuff. */
- /* ~0 will not be in any file, we hope. */
- objfile -> ei.entry_point = ~0;
- /* set the startup file to be an empty range. */
- objfile -> ei.entry_file_lowpc = 0;
- objfile -> ei.entry_file_highpc = 0;
+ objfile -> ei.entry_point = INVALID_ENTRY_POINT;
}
+ objfile -> ei.entry_file_lowpc = INVALID_ENTRY_LOWPC;
+ objfile -> ei.entry_file_highpc = INVALID_ENTRY_HIGHPC;
+ objfile -> ei.entry_func_lowpc = INVALID_ENTRY_LOWPC;
+ objfile -> ei.entry_func_highpc = INVALID_ENTRY_HIGHPC;
+ objfile -> ei.main_func_lowpc = INVALID_ENTRY_LOWPC;
+ objfile -> ei.main_func_highpc = INVALID_ENTRY_HIGHPC;
+}
+
+/* Get current entry point address. */
+
+CORE_ADDR
+entry_point_address()
+{
+ return symfile_objfile ? symfile_objfile->ei.entry_point : 0;
}
/* Remember the lowest-addressed loadable section we've seen.
- This function is called via bfd_map_over_sections. */
+ This function is called via bfd_map_over_sections.
-#if 0 /* Not used yet */
-static void
+ In case of equal vmas, the section with the largest size becomes the
+ lowest-addressed loadable section.
+
+ If the vmas and sizes are equal, the last section is considered the
+ lowest-addressed loadable section. */
+
+void
find_lowest_section (abfd, sect, obj)
bfd *abfd;
asection *sect;
return;
if (!*lowest)
*lowest = sect; /* First loadable section */
- else if (bfd_section_vma (abfd, *lowest) >= bfd_section_vma (abfd, sect))
+ else if (bfd_section_vma (abfd, *lowest) > bfd_section_vma (abfd, sect))
*lowest = sect; /* A lower loadable section */
+ else if (bfd_section_vma (abfd, *lowest) == bfd_section_vma (abfd, sect)
+ && (bfd_section_size (abfd, (*lowest))
+ <= bfd_section_size (abfd, sect)))
+ *lowest = sect;
+}
+
+/* Parse the user's idea of an offset for dynamic linking, into our idea
+ of how to represent it for fast symbol reading. This is the default
+ version of the sym_fns.sym_offsets function for symbol readers that
+ don't need to do anything special. It allocates a section_offsets table
+ for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
+
+struct section_offsets *
+default_symfile_offsets (objfile, addr)
+ struct objfile *objfile;
+ CORE_ADDR addr;
+{
+ struct section_offsets *section_offsets;
+ int i;
+
+ objfile->num_sections = SECT_OFF_MAX;
+ section_offsets = (struct section_offsets *)
+ obstack_alloc (&objfile -> psymbol_obstack, SIZEOF_SECTION_OFFSETS);
+
+ for (i = 0; i < SECT_OFF_MAX; i++)
+ ANOFFSET (section_offsets, i) = addr;
+
+ return section_offsets;
}
-#endif
+
/* Process a symbol file, as either the main file or as a dynamically
loaded file.
/* Make sure that partially constructed symbol tables will be cleaned up
if an error occurs during symbol reading. */
- old_chain = make_cleanup (free_objfile, objfile);
+ old_chain = make_cleanup ((make_cleanup_func) free_objfile, objfile);
if (mainline)
{
/* We will modify the main symbol table, make sure that all its users
will be cleaned up if an error occurs during symbol reading. */
- make_cleanup (clear_symtab_users, 0);
+ make_cleanup ((make_cleanup_func) clear_symtab_users, 0);
/* Since no error yet, throw away the old symbol table. */
symfile_objfile = NULL;
}
+ /* Currently we keep symbols from the add-symbol-file command.
+ If the user wants to get rid of them, they should do "symbol-file"
+ without arguments first. Not sure this is the best behavior
+ (PR 2207). */
+
(*objfile -> sf -> sym_new_init) (objfile);
}
/* Convert addr into an offset rather than an absolute address.
We find the lowest address of a loaded segment in the objfile,
and assume that <addr> is where that got loaded. Due to historical
- precedent, we warn if that doesn't happen to be the ".text"
- segment. */
+ precedent, we warn if that doesn't happen to be a text segment. */
if (mainline)
{
else
{
lowest_sect = bfd_get_section_by_name (objfile->obfd, ".text");
-#if 0
- lowest_sect = 0;
- bfd_map_over_sections (objfile->obfd, find_lowest_section,
- (PTR) &lowest_sect);
-#endif
+ if (lowest_sect == NULL)
+ bfd_map_over_sections (objfile->obfd, find_lowest_section,
+ (PTR) &lowest_sect);
- if (lowest_sect == 0)
+ if (lowest_sect == NULL)
warning ("no loadable sections found in added symbol-file %s",
objfile->name);
- else if (0 == bfd_get_section_name (objfile->obfd, lowest_sect)
- || !STREQ (".text",
- bfd_get_section_name (objfile->obfd, lowest_sect)))
- warning ("Lowest section in %s is %s at 0x%x",
+ else if ((bfd_get_section_flags (objfile->obfd, lowest_sect) & SEC_CODE)
+ == 0)
+ /* FIXME-32x64--assumes bfd_vma fits in long. */
+ warning ("Lowest section in %s is %s at 0x%lx",
objfile->name,
bfd_section_name (objfile->obfd, lowest_sect),
- bfd_section_vma (objfile->obfd, lowest_sect));
+ (unsigned long) bfd_section_vma (objfile->obfd, lowest_sect));
if (lowest_sect)
addr -= bfd_section_vma (objfile->obfd, lowest_sect);
(*objfile -> sf -> sym_init) (objfile);
clear_complaints (1, verbo);
- /* If objfile->sf->sym_offsets doesn't set this, we don't care
- (currently). */
- objfile->num_sections = 0; /* krp-FIXME: why zero? */
section_offsets = (*objfile -> sf -> sym_offsets) (objfile, addr);
objfile->section_offsets = section_offsets;
(*objfile -> sf -> sym_read) (objfile, section_offsets, mainline);
- /* Don't allow char * to have a typename (else would get caddr_t.) */
- /* Ditto void *. FIXME should do this for all the builtin types. */
+ if (!have_partial_symbols () && !have_full_symbols ())
+ {
+ wrap_here ("");
+ printf_filtered ("(no debugging symbols found)...");
+ wrap_here ("");
+ }
+
+ /* Don't allow char * to have a typename (else would get caddr_t).
+ Ditto void *. FIXME: Check whether this is now done by all the
+ symbol readers themselves (many of them now do), and if so remove
+ it from here. */
TYPE_NAME (lookup_pointer_type (builtin_type_char)) = 0;
TYPE_NAME (lookup_pointer_type (builtin_type_void)) = 0;
/* Discard cleanups as symbol reading was successful. */
discard_cleanups (old_chain);
+
+/* Call this after reading in a new symbol table to give target dependant code
+ a crack at the new symbols. For instance, this could be used to update the
+ values of target-specific symbols GDB needs to keep track of (such as
+ _sigtramp, or whatever). */
+
+ TARGET_SYMFILE_POSTREAD (objfile);
}
/* Perform required actions after either reading in the initial
as dynamically loaded code. If !mainline, ADDR is the address
where the text segment was loaded.
+ USER_LOADED is TRUE if the add-symbol-file command was how this
+ symbol file came to be processed.
+
+ IS_SOLIB is TRUE if this symbol file represents a solib, as discovered
+ by the target's implementation of the solib package.
+
Upon success, returns a pointer to the objfile that was added.
Upon failure, jumps back to command level (never returns). */
struct objfile *
-symbol_file_add (name, from_tty, addr, mainline, mapped, readnow)
+symbol_file_add (name, from_tty, addr, mainline, mapped, readnow, user_loaded, is_solib)
char *name;
int from_tty;
CORE_ADDR addr;
int mainline;
int mapped;
int readnow;
+ int user_loaded;
+ int is_solib;
{
struct objfile *objfile;
struct partial_symtab *psymtab;
abfd = symfile_bfd_open (name);
+#if 0
+#ifdef GDB_TARGET_IS_HPPA
+{
+ /********* TARGET SPECIFIC CODE (HACK!) **********
+ *
+ * The following code is HP-specific. The "right" way of
+ * doing this is unknown, but we bet would involve a target-
+ * specific pre-file-load check using a generic mechanism.
+ */
+ /* elz: I moved this code from inside the symfile_bfd_open function
+ this way we don't have to worry about recursion.
+ I also have taken out the call to pxdb from within the check
+ for pxdb processing. Seemed two logically unrelated things,
+ and I needed a pure checking later on anyway.
+ */
+
+ if( hpread_pxdb_needed( abfd ))
+ {
+ /*
+ * This file has not been pre-processed.
+ * Preprocess now
+ */
+
+ if (hpread_call_pxdb(name))
+ {
+ /* The
+ * call above has used "system" to pre-process
+ * the on-disk file, so we now need to close
+ * and re-open the file.
+ */
+ bfd_close (abfd); /* This also closes 'desc', */
+ /* hence the recursion. */
+ abfd = symfile_bfd_open( name );
+ }
+ else /* we fail miserably without pxdb!!!*/
+ /* the warning to the user has already been given
+ from within the call_pxdb function
+ */
+ error("Command ignored.\n");
+ }
+}
+ /*************** END HACK ********************/
+#endif
+#endif /* 0 */
+
+
if ((have_full_symbols () || have_partial_symbols ())
&& mainline
&& from_tty
&& !query ("Load new symbol table from \"%s\"? ", name))
error ("Not confirmed.");
- objfile = allocate_objfile (abfd, mapped);
+ objfile = allocate_objfile (abfd, mapped, user_loaded, is_solib);
/* If the objfile uses a mapped symbol file, and we have a psymtab for
it, then skip reading any symbols at this time. */
{
printf_filtered ("Mapped symbols for %s...", name);
wrap_here ("");
- fflush (stdout);
+ gdb_flush (gdb_stdout);
}
init_entry_point_info (objfile);
find_sym_fns (objfile);
performed, or need to read an unmapped symbol table. */
if (from_tty || info_verbose)
{
- printf_filtered ("Reading symbols from %s...", name);
- wrap_here ("");
- fflush (stdout);
+ if (pre_add_symbol_hook)
+ pre_add_symbol_hook (name);
+ else
+ {
+ printf_filtered ("Reading symbols from %s...", name);
+ wrap_here ("");
+ gdb_flush (gdb_stdout);
+ }
}
syms_from_objfile (objfile, addr, mainline, from_tty);
- }
+ }
/* We now have at least a partial symbol table. Check to see if the
user requested that all symbols be read on initial access via either
{
printf_filtered ("expanding to full symbols...");
wrap_here ("");
- fflush (stdout);
+ gdb_flush (gdb_stdout);
}
for (psymtab = objfile -> psymtabs;
if (from_tty || info_verbose)
{
- printf_filtered ("done.\n");
- fflush (stdout);
+ if (post_add_symbol_hook)
+ post_add_symbol_hook ();
+ else
+ {
+ printf_filtered ("done.\n");
+ gdb_flush (gdb_stdout);
+ }
}
new_symfile_objfile (objfile, mainline, from_tty);
-
- /* Getting new symbols may change our opinion about what is
- frameless. */
- reinit_frame_cache ();
+ target_new_objfile (objfile);
return (objfile);
}
-/* This is the symbol-file command. Read the file, analyze its symbols,
- and add a struct symtab to a symtab list. */
+/* This is the symbol-file command. Read the file, analyze its
+ symbols, and add a struct symtab to a symtab list. The syntax of
+ the command is rather bizarre--(1) buildargv implements various
+ quoting conventions which are undocumented and have little or
+ nothing in common with the way things are quoted (or not quoted)
+ elsewhere in GDB, (2) options are used, which are not generally
+ used in GDB (perhaps "set mapped on", "set readnow on" would be
+ better), (3) the order of options matters, which is contrary to GNU
+ conventions (because it is confusing and inconvenient). */
void
symbol_file_command (args, from_tty)
{
char **argv;
char *name = NULL;
+ CORE_ADDR text_relocation = 0; /* text_relocation */
struct cleanup *cleanups;
int mapped = 0;
int readnow = 0;
symfile_objfile -> name))
error ("Not confirmed.");
free_all_objfiles ();
+
+ /* solib descriptors may have handles to objfiles. Since their
+ storage has just been released, we'd better wipe the solib
+ descriptors as well.
+ */
+#if defined(SOLIB_RESTART)
+ SOLIB_RESTART ();
+#endif
+
symfile_objfile = NULL;
if (from_tty)
{
- printf ("No symbol file now.\n");
+ printf_unfiltered ("No symbol file now.\n");
}
+#ifdef HPUXHPPA
+ RESET_HP_UX_GLOBALS ();
+#endif
}
else
{
{
nomem (0);
}
- cleanups = make_cleanup (freeargv, (char *) argv);
+ cleanups = make_cleanup ((make_cleanup_func) freeargv, (char *) argv);
while (*argv != NULL)
{
if (STREQ (*argv, "-mapped"))
}
else
{
- name = *argv;
+ char *p;
+
+ name = *argv;
+
+ /* this is for rombug remote only, to get the text relocation by
+ using link command */
+ p = strrchr(name, '/');
+ if (p != NULL) p++;
+ else p = name;
+
+ target_link(p, &text_relocation);
+
+ if (text_relocation == (CORE_ADDR)0)
+ return;
+ else if (text_relocation == (CORE_ADDR)-1)
+ {
+ symbol_file_add (name, from_tty, (CORE_ADDR)0,
+ 1, mapped, readnow, 1, 0);
+#ifdef HPUXHPPA
+ RESET_HP_UX_GLOBALS ();
+#endif
+ }
+ else
+ symbol_file_add (name, from_tty, (CORE_ADDR)text_relocation,
+ 0, mapped, readnow, 1, 0);
+
+ /* Getting new symbols may change our opinion about what is
+ frameless. */
+ reinit_frame_cache ();
+
+ set_initial_language ();
}
argv++;
}
{
error ("no symbol file name was specified");
}
- else
- {
- symbol_file_add (name, from_tty, (CORE_ADDR)0, 1, mapped, readnow);
- set_initial_language ();
- }
+ TUIDO(((TuiOpaqueFuncPtr)tuiDisplayMainFunction));
do_cleanups (cleanups);
}
}
malloc'd` copy of NAME (tilde-expanded and made absolute).
In case of trouble, error() is called. */
-static bfd *
+bfd *
symfile_bfd_open (name)
char *name;
{
int desc;
char *absolute_name;
+
+
name = tilde_expand (name); /* Returns 1st new malloc'd copy */
/* Look down path for it, allocate 2nd new malloc'd copy. */
desc = openp (getenv ("PATH"), 1, name, O_RDONLY | O_BINARY, 0, &absolute_name);
+#if defined(__GO32__) || defined(_WIN32)
+ if (desc < 0)
+ {
+ char *exename = alloca (strlen (name) + 5);
+ strcat (strcpy (exename, name), ".exe");
+ desc = openp (getenv ("PATH"), 1, exename, O_RDONLY | O_BINARY,
+ 0, &absolute_name);
+ }
+#endif
if (desc < 0)
{
make_cleanup (free, name);
close (desc);
make_cleanup (free, name);
error ("\"%s\": can't open to read symbols: %s.", name,
- bfd_errmsg (bfd_error));
+ bfd_errmsg (bfd_get_error ()));
}
sym_bfd->cacheable = true;
if (!bfd_check_format (sym_bfd, bfd_object))
{
+ /* FIXME: should be checking for errors from bfd_close (for one thing,
+ on error it does not free all the storage associated with the
+ bfd). */
bfd_close (sym_bfd); /* This also closes desc */
make_cleanup (free, name);
error ("\"%s\": can't read symbols: %s.", name,
- bfd_errmsg (bfd_error));
+ bfd_errmsg (bfd_get_error ()));
}
+#ifdef HPUXHPPA
+ {
+ /********* TARGET SPECIFIC CODE (HACK!) **********
+ *
+ * The following code is HP-specific. The "right" way of
+ * doing this is unknown, but we bet would involve a target-
+ * specific pre-file-load check using a generic mechanism.
+ */
+ static prevent_recursion = 0; /* Needed for hack below! HP-specific */
+
+ if( prevent_recursion == 0 ) {
+ if( hpread_pxdb_needed (sym_bfd, name)) {
+ /*
+ * This file has not been pre-processed.
+ * Preprocess now
+ */
+
+ if (hpread_call_pxdb(name))
+ {
+ /* The
+ * call above has used "system" to pre-process
+ * the on-disk file, so we now need to close
+ * and re-open the file.
+ */
+ bfd_close (sym_bfd); /* This also closes 'desc', */
+ /* hence the recursion. */
+ prevent_recursion++;
+ sym_bfd = symfile_bfd_open( name );
+ prevent_recursion--;
+ }
+ }
+ }
+}
+ /*************** END HACK ********************/
+#endif
+
return (sym_bfd);
}
struct objfile *objfile;
{
struct sym_fns *sf;
+ enum bfd_flavour our_flavour = bfd_get_flavour (objfile -> obfd);
+ char *our_target = bfd_get_target (objfile -> obfd);
+
+ /* Special kludge for RS/6000 and PowerMac. See xcoffread.c. */
+ if (STREQ (our_target, "aixcoff-rs6000") ||
+ STREQ (our_target, "xcoff-powermac"))
+ our_flavour = (enum bfd_flavour)-1;
+
+ /* Special kludge for apollo. See dstread.c. */
+ if (STREQN (our_target, "apollo", 6))
+ our_flavour = (enum bfd_flavour)-2;
for (sf = symtab_fns; sf != NULL; sf = sf -> next)
{
- if (strncmp (bfd_get_target (objfile -> obfd),
- sf -> sym_name, sf -> sym_namelen) == 0)
+ if (our_flavour == sf -> sym_flavour)
{
objfile -> sf = sf;
return;
char *arg;
int from_tty;
{
+ if (arg == NULL)
+ arg = get_exec_file (1);
target_load (arg, from_tty);
}
to worry about finding it, and (b) On VMS, fork() is very slow and so
we don't want to run a subprocess. On the other hand, I'm not sure how
performance compares. */
+#define GENERIC_LOAD_CHUNK 256
+#define VALIDATE_DOWNLOAD 0
void
generic_load (filename, from_tty)
char *filename;
{
struct cleanup *old_cleanups;
asection *s;
- bfd *loadfile_bfd = bfd_openr (filename, gnutarget);
+ bfd *loadfile_bfd;
+ time_t start_time, end_time; /* Start and end times of download */
+ unsigned long data_count = 0; /* Number of bytes transferred to memory */
+ int n;
+ unsigned long load_offset = 0; /* offset to add to vma for each section */
+ char buf[GENERIC_LOAD_CHUNK+8];
+#if VALIDATE_DOWNLOAD
+ char verify_buffer[GENERIC_LOAD_CHUNK+8] ;
+#endif
+
+ /* enable user to specify address for downloading as 2nd arg to load */
+ n = sscanf(filename, "%s 0x%lx", buf, &load_offset);
+ if (n > 1 )
+ filename = buf;
+ else
+ load_offset = 0;
+
+ loadfile_bfd = bfd_openr (filename, gnutarget);
if (loadfile_bfd == NULL)
{
perror_with_name (filename);
return;
}
- old_cleanups = make_cleanup (bfd_close, loadfile_bfd);
+ /* FIXME: should be checking for errors from bfd_close (for one thing,
+ on error it does not free all the storage associated with the
+ bfd). */
+ old_cleanups = make_cleanup ((make_cleanup_func) bfd_close, loadfile_bfd);
if (!bfd_check_format (loadfile_bfd, bfd_object))
{
error ("\"%s\" is not an object file: %s", filename,
- bfd_errmsg (bfd_error));
+ bfd_errmsg (bfd_get_error ()));
}
+ start_time = time (NULL);
+
for (s = loadfile_bfd->sections; s; s = s->next)
{
if (s->flags & SEC_LOAD)
- {
- bfd_size_type size;
-
- size = bfd_get_section_size_before_reloc (s);
- if (size > 0)
- {
- char *buffer;
- struct cleanup *old_chain;
- bfd_vma vma;
-
- buffer = xmalloc (size);
- old_chain = make_cleanup (free, buffer);
-
- vma = bfd_get_section_vma (loadfile_bfd, s);
-
- /* Is this really necessary? I guess it gives the user something
- to look at during a long download. */
- printf_filtered ("Loading section %s, size 0x%x vma 0x%x\n",
- bfd_get_section_name (loadfile_bfd, s),
- size, vma);
-
- bfd_get_section_contents (loadfile_bfd, s, buffer, 0, size);
+ {
+ bfd_size_type size;
+
+ size = bfd_get_section_size_before_reloc (s);
+ if (size > 0)
+ {
+ char *buffer;
+ struct cleanup *old_chain;
+ bfd_vma lma;
+ unsigned long l = size ;
+ int err;
+ char *sect;
+ unsigned long sent;
+ unsigned long len;
+
+ l = l > GENERIC_LOAD_CHUNK ? GENERIC_LOAD_CHUNK : l ;
+
+ buffer = xmalloc (size);
+ old_chain = make_cleanup (free, buffer);
+
+ lma = s->lma;
+ lma += load_offset;
+
+ /* Is this really necessary? I guess it gives the user something
+ to look at during a long download. */
+ printf_filtered ("Loading section %s, size 0x%lx lma ",
+ bfd_get_section_name (loadfile_bfd, s),
+ (unsigned long) size);
+ print_address_numeric (lma, 1, gdb_stdout);
+ printf_filtered ("\n");
+
+ bfd_get_section_contents (loadfile_bfd, s, buffer, 0, size);
+
+ sect = (char *) bfd_get_section_name (loadfile_bfd, s);
+ sent = 0;
+ do
+ {
+ len = (size - sent) < l ? (size - sent) : l;
+ sent += len;
+ err = target_write_memory (lma, buffer, len);
+ if (ui_load_progress_hook)
+ if (ui_load_progress_hook (sect, sent))
+ error ("Canceled the download");
+#if VALIDATE_DOWNLOAD
+ /* Broken memories and broken monitors manifest themselves
+ here when bring new computers to life.
+ This doubles already slow downloads.
+ */
+ if (err) break ;
+ {
+ target_read_memory(lma,verify_buffer,len) ;
+ if (0 != bcmp(buffer,verify_buffer,len))
+ error("Download verify failed at %08x",
+ (unsigned long)lma) ;
+ }
- target_write_memory (vma, buffer, size);
-
- do_cleanups (old_chain);
- }
- }
+#endif
+ data_count += len ;
+ lma += len;
+ buffer += len;
+ } /* od */
+ while (err == 0 && sent < size);
+
+ if (err != 0)
+ error ("Memory access error while loading section %s.",
+ bfd_get_section_name (loadfile_bfd, s));
+
+ do_cleanups (old_chain);
+ }
+ }
}
- /* We were doing this in remote-mips.c, I suspect it is right
- for other targets too. */
- write_pc (loadfile_bfd->start_address);
+ end_time = time (NULL);
+ {
+ unsigned long entry ;
+ entry = bfd_get_start_address(loadfile_bfd) ;
+ printf_filtered ("Start address 0x%lx , load size %d\n", entry,data_count);
+ /* We were doing this in remote-mips.c, I suspect it is right
+ for other targets too. */
+ write_pc (entry);
+ }
/* FIXME: are we supposed to call symbol_file_add or not? According to
a comment from remote-mips.c (where a call to symbol_file_add was
loaded in. remote-nindy.c had no call to symbol_file_add, but remote-vx.c
does. */
+ report_transfer_performance (data_count, start_time, end_time);
+
do_cleanups (old_cleanups);
}
+/* Report how fast the transfer went. */
+
+void
+report_transfer_performance (data_count, start_time, end_time)
+unsigned long data_count;
+time_t start_time, end_time;
+{
+ printf_filtered ("Transfer rate: ");
+ if (end_time != start_time)
+ printf_filtered ("%d bits/sec",
+ (data_count * 8) / (end_time - start_time));
+ else
+ printf_filtered ("%d bits in <1 sec", (data_count * 8));
+ printf_filtered (".\n");
+}
+
/* This function allows the addition of incrementally linked object files.
It does not modify any state in the target, only in the debugger. */
left pointing at the remainder of the command line, which should
be the address expression to evaluate. */
- if ((name == NULL) || (*args == '\000') )
+ if (name == NULL)
{
- error ("add-symbol-file takes a file name and an address");
+ error ("add-symbol-file takes a file name");
}
name = tilde_expand (name);
make_cleanup (free, name);
- text_addr = parse_and_eval_address (args);
+ if (*args != '\000')
+ {
+ text_addr = parse_and_eval_address (args);
+ }
+ else
+ {
+ target_link(name, &text_addr);
+ if (text_addr == (CORE_ADDR)-1)
+ error("Don't know how to get text start location for this file");
+ }
- if (!query ("add symbol table from file \"%s\" at text_addr = %s?\n",
- name, local_hex_string (text_addr)))
+ /* FIXME-32x64: Assumes text_addr fits in a long. */
+ if ((from_tty)
+ && (!query ("add symbol table from file \"%s\" at text_addr = %s?\n",
+ name, local_hex_string ((unsigned long)text_addr))))
error ("Not confirmed.");
- symbol_file_add (name, 0, text_addr, 0, mapped, readnow);
+ symbol_file_add (name, from_tty, text_addr, 0, mapped, readnow,
+ 1, /* user_loaded */
+ 0); /* We'll guess it's ! is_solib */
+
+ /* Getting new symbols may change our opinion about what is
+ frameless. */
+ reinit_frame_cache ();
+}
+\f
+static void
+add_shared_symbol_files_command (args, from_tty)
+ char *args;
+ int from_tty;
+{
+#ifdef ADD_SHARED_SYMBOL_FILES
+ ADD_SHARED_SYMBOL_FILES (args, from_tty);
+#else
+ error ("This command is not available in this configuration of GDB.");
+#endif
}
\f
/* Re-read symbols if a symbol-file has changed. */
This routine should then walk down each partial symbol table
and see if the symbol table that it originates from has been changed */
-the_big_top:
for (objfile = object_files; objfile; objfile = objfile->next) {
if (objfile->obfd) {
#ifdef IBM6000_TARGET
continue;
}
new_modtime = new_statbuf.st_mtime;
- if (new_modtime != objfile->mtime) {
- printf_filtered ("`%s' has changed; re-reading symbols.\n",
- objfile->name);
- /* FIXME, this should use a different command...that would only
- affect this objfile's symbols, and would reset objfile->mtime.
- (objfile->mtime = new_modtime;)
- HOWEVER, that command isn't written yet -- so call symbol_file_
- command, and restart the scan from the top, because it munges
- the object_files list. */
- symbol_file_command (objfile->name, 0);
- reread_one = 1;
- goto the_big_top; /* Start over. */
- }
+ if (new_modtime != objfile->mtime)
+ {
+ struct cleanup *old_cleanups;
+ struct section_offsets *offsets;
+ int num_offsets;
+ int section_offsets_size;
+ char *obfd_filename;
+
+ printf_filtered ("`%s' has changed; re-reading symbols.\n",
+ objfile->name);
+
+ /* There are various functions like symbol_file_add,
+ symfile_bfd_open, syms_from_objfile, etc., which might
+ appear to do what we want. But they have various other
+ effects which we *don't* want. So we just do stuff
+ ourselves. We don't worry about mapped files (for one thing,
+ any mapped file will be out of date). */
+
+ /* If we get an error, blow away this objfile (not sure if
+ that is the correct response for things like shared
+ libraries). */
+ old_cleanups = make_cleanup ((make_cleanup_func) free_objfile,
+ objfile);
+ /* We need to do this whenever any symbols go away. */
+ make_cleanup ((make_cleanup_func) clear_symtab_users, 0);
+
+ /* Clean up any state BFD has sitting around. We don't need
+ to close the descriptor but BFD lacks a way of closing the
+ BFD without closing the descriptor. */
+ obfd_filename = bfd_get_filename (objfile->obfd);
+ if (!bfd_close (objfile->obfd))
+ error ("Can't close BFD for %s: %s", objfile->name,
+ bfd_errmsg (bfd_get_error ()));
+ objfile->obfd = bfd_openr (obfd_filename, gnutarget);
+ if (objfile->obfd == NULL)
+ error ("Can't open %s to read symbols.", objfile->name);
+ /* bfd_openr sets cacheable to true, which is what we want. */
+ if (!bfd_check_format (objfile->obfd, bfd_object))
+ error ("Can't read symbols from %s: %s.", objfile->name,
+ bfd_errmsg (bfd_get_error ()));
+
+ /* Save the offsets, we will nuke them with the rest of the
+ psymbol_obstack. */
+ num_offsets = objfile->num_sections;
+ section_offsets_size =
+ sizeof (struct section_offsets)
+ + sizeof (objfile->section_offsets->offsets) * num_offsets;
+ offsets = (struct section_offsets *) alloca (section_offsets_size);
+ memcpy (offsets, objfile->section_offsets, section_offsets_size);
+
+ /* Nuke all the state that we will re-read. Much of the following
+ code which sets things to NULL really is necessary to tell
+ other parts of GDB that there is nothing currently there. */
+
+ /* FIXME: Do we have to free a whole linked list, or is this
+ enough? */
+ if (objfile->global_psymbols.list)
+ mfree (objfile->md, objfile->global_psymbols.list);
+ memset (&objfile -> global_psymbols, 0,
+ sizeof (objfile -> global_psymbols));
+ if (objfile->static_psymbols.list)
+ mfree (objfile->md, objfile->static_psymbols.list);
+ memset (&objfile -> static_psymbols, 0,
+ sizeof (objfile -> static_psymbols));
+
+ /* Free the obstacks for non-reusable objfiles */
+ obstack_free (&objfile -> psymbol_cache.cache, 0);
+ memset (&objfile -> psymbol_cache, 0,
+ sizeof (objfile -> psymbol_cache));
+ obstack_free (&objfile -> psymbol_obstack, 0);
+ obstack_free (&objfile -> symbol_obstack, 0);
+ obstack_free (&objfile -> type_obstack, 0);
+ objfile->sections = NULL;
+ objfile->symtabs = NULL;
+ objfile->psymtabs = NULL;
+ objfile->free_psymtabs = NULL;
+ objfile->msymbols = NULL;
+ objfile->minimal_symbol_count= 0;
+ objfile->fundamental_types = NULL;
+ if (objfile -> sf != NULL)
+ {
+ (*objfile -> sf -> sym_finish) (objfile);
+ }
+
+ /* We never make this a mapped file. */
+ objfile -> md = NULL;
+ /* obstack_specify_allocation also initializes the obstack so
+ it is empty. */
+ obstack_specify_allocation (&objfile -> psymbol_cache.cache, 0, 0,
+ xmalloc, free);
+ obstack_specify_allocation (&objfile -> psymbol_obstack, 0, 0,
+ xmalloc, free);
+ obstack_specify_allocation (&objfile -> symbol_obstack, 0, 0,
+ xmalloc, free);
+ obstack_specify_allocation (&objfile -> type_obstack, 0, 0,
+ xmalloc, free);
+ if (build_objfile_section_table (objfile))
+ {
+ error ("Can't find the file sections in `%s': %s",
+ objfile -> name, bfd_errmsg (bfd_get_error ()));
+ }
+
+ /* We use the same section offsets as from last time. I'm not
+ sure whether that is always correct for shared libraries. */
+ objfile->section_offsets = (struct section_offsets *)
+ obstack_alloc (&objfile -> psymbol_obstack, section_offsets_size);
+ memcpy (objfile->section_offsets, offsets, section_offsets_size);
+ objfile->num_sections = num_offsets;
+
+ /* What the hell is sym_new_init for, anyway? The concept of
+ distinguishing between the main file and additional files
+ in this way seems rather dubious. */
+ if (objfile == symfile_objfile)
+ {
+ (*objfile->sf->sym_new_init) (objfile);
+#ifdef HPUXHPPA
+ RESET_HP_UX_GLOBALS ();
+#endif
+ }
+
+ (*objfile->sf->sym_init) (objfile);
+ clear_complaints (1, 1);
+ /* The "mainline" parameter is a hideous hack; I think leaving it
+ zero is OK since dbxread.c also does what it needs to do if
+ objfile->global_psymbols.size is 0. */
+ (*objfile->sf->sym_read) (objfile, objfile->section_offsets, 0);
+ if (!have_partial_symbols () && !have_full_symbols ())
+ {
+ wrap_here ("");
+ printf_filtered ("(no debugging symbols found)\n");
+ wrap_here ("");
+ }
+ objfile -> flags |= OBJF_SYMS;
+
+ /* We're done reading the symbol file; finish off complaints. */
+ clear_complaints (0, 1);
+
+ /* Getting new symbols may change our opinion about what is
+ frameless. */
+
+ reinit_frame_cache ();
+
+ /* Discard cleanups as symbol reading was successful. */
+ discard_cleanups (old_cleanups);
+
+ /* If the mtime has changed between the time we set new_modtime
+ and now, we *want* this to be out of date, so don't call stat
+ again now. */
+ objfile->mtime = new_modtime;
+ reread_one = 1;
+
+ /* Call this after reading in a new symbol table to give target
+ dependant code a crack at the new symbols. For instance, this
+ could be used to update the values of target-specific symbols GDB
+ needs to keep track of (such as _sigtramp, or whatever). */
+
+ TARGET_SYMFILE_POSTREAD (objfile);
+ }
}
}
if (reread_one)
- breakpoint_re_set ();
+ clear_symtab_users ();
}
\f
+
+typedef struct {
+ char *ext;
+ enum language lang;
+} filename_language;
+
+static filename_language * filename_language_table;
+static int fl_table_size, fl_table_next;
+
+static void
+add_filename_language (ext, lang)
+ char *ext;
+ enum language lang;
+{
+ if (fl_table_next >= fl_table_size)
+ {
+ fl_table_size += 10;
+ filename_language_table = realloc (filename_language_table,
+ fl_table_size);
+ }
+
+ filename_language_table[fl_table_next].ext = strsave (ext);
+ filename_language_table[fl_table_next].lang = lang;
+ fl_table_next++;
+}
+
+static char *ext_args;
+
+static void
+set_ext_lang_command (args, from_tty)
+ char *args;
+ int from_tty;
+{
+ int i;
+ char *cp = ext_args;
+ enum language lang;
+
+ /* First arg is filename extension, starting with '.' */
+ if (*cp != '.')
+ error ("'%s': Filename extension must begin with '.'", ext_args);
+
+ /* Find end of first arg. */
+ while (*cp && !isspace (*cp))
+ cp++;
+
+ if (*cp == '\0')
+ error ("'%s': two arguments required -- filename extension and language",
+ ext_args);
+
+ /* Null-terminate first arg */
+ *cp++ = '\0';
+
+ /* Find beginning of second arg, which should be a source language. */
+ while (*cp && isspace (*cp))
+ cp++;
+
+ if (*cp == '\0')
+ error ("'%s': two arguments required -- filename extension and language",
+ ext_args);
+
+ /* Lookup the language from among those we know. */
+ lang = language_enum (cp);
+
+ /* Now lookup the filename extension: do we already know it? */
+ for (i = 0; i < fl_table_next; i++)
+ if (0 == strcmp (ext_args, filename_language_table[i].ext))
+ break;
+
+ if (i >= fl_table_next)
+ {
+ /* new file extension */
+ add_filename_language (ext_args, lang);
+ }
+ else
+ {
+ /* redefining a previously known filename extension */
+
+ /* if (from_tty) */
+ /* query ("Really make files of type %s '%s'?", */
+ /* ext_args, language_str (lang)); */
+
+ free (filename_language_table[i].ext);
+ filename_language_table[i].ext = strsave (ext_args);
+ filename_language_table[i].lang = lang;
+ }
+}
+
+static void
+info_ext_lang_command (args, from_tty)
+ char *args;
+ int from_tty;
+{
+ int i;
+
+ printf_filtered ("Filename extensions and the languages they represent:");
+ printf_filtered ("\n\n");
+ for (i = 0; i < fl_table_next; i++)
+ printf_filtered ("\t%s\t- %s\n",
+ filename_language_table[i].ext,
+ language_str (filename_language_table[i].lang));
+}
+
+static void
+init_filename_language_table ()
+{
+ if (fl_table_size == 0) /* protect against repetition */
+ {
+ fl_table_size = 20;
+ fl_table_next = 0;
+ filename_language_table =
+ xmalloc (fl_table_size * sizeof (*filename_language_table));
+ add_filename_language (".c", language_c);
+ add_filename_language (".C", language_cplus);
+ add_filename_language (".cc", language_cplus);
+ add_filename_language (".cp", language_cplus);
+ add_filename_language (".cpp", language_cplus);
+ add_filename_language (".cxx", language_cplus);
+ add_filename_language (".c++", language_cplus);
+ /* start-sanitize-java */
+ add_filename_language (".java", language_java);
+ add_filename_language (".class", language_java);
+ /* end-sanitize-java */
+ add_filename_language (".ch", language_chill);
+ add_filename_language (".c186", language_chill);
+ add_filename_language (".c286", language_chill);
+ add_filename_language (".f", language_fortran);
+ add_filename_language (".F", language_fortran);
+ add_filename_language (".s", language_asm);
+ add_filename_language (".S", language_asm);
+ }
+}
+
enum language
deduce_language_from_filename (filename)
char *filename;
{
- char *c;
-
- if (0 == filename)
- ; /* Get default */
- else if (0 == (c = strrchr (filename, '.')))
- ; /* Get default. */
- else if(STREQ(c,".mod"))
- return language_m2;
- else if(STREQ(c,".c"))
- return language_c;
- else if(STREQ(c,".cc") || STREQ(c,".C"))
- return language_cplus;
- else if(STREQ(c,".ch") || STREQ(c,".c186") || STREQ(c,".c286"))
- return language_chill;
-
- return language_unknown; /* default */
+ int i;
+ char *cp;
+
+ if (filename != NULL)
+ if ((cp = strrchr (filename, '.')) != NULL)
+ for (i = 0; i < fl_table_next; i++)
+ if (strcmp (cp, filename_language_table[i].ext) == 0)
+ return filename_language_table[i].lang;
+
+ return language_unknown;
}
\f
/* allocate_symtab:
symtab->dirname
symtab->free_code
symtab->free_ptr
- initialize any EXTRA_SYMTAB_INFO
possibly free_named_symtabs (symtab->filename);
*/
&objfile -> symbol_obstack);
symtab -> fullname = NULL;
symtab -> language = deduce_language_from_filename (filename);
+ symtab -> debugformat = obsavestring ("unknown", 7,
+ &objfile -> symbol_obstack);
/* Hook it to the objfile it comes from */
symtab -> next = objfile -> symtabs;
objfile -> symtabs = symtab;
+ /* FIXME: This should go away. It is only defined for the Z8000,
+ and the Z8000 definition of this macro doesn't have anything to
+ do with the now-nonexistent EXTRA_SYMTAB_INFO macro, it's just
+ here for convenience. */
#ifdef INIT_EXTRA_SYMTAB_INFO
INIT_EXTRA_SYMTAB_INFO (symtab);
#endif
&objfile -> psymbol_obstack);
psymtab -> symtab = NULL;
- /* Hook it to the objfile it comes from */
+ /* Prepend it to the psymtab list for the objfile it belongs to.
+ Psymtabs are searched in most recent inserted -> least recent
+ inserted order. */
psymtab -> objfile = objfile;
psymtab -> next = objfile -> psymtabs;
objfile -> psymtabs = psymtab;
+#if 0
+ {
+ struct partial_symtab **prev_pst;
+ psymtab -> objfile = objfile;
+ psymtab -> next = NULL;
+ prev_pst = &(objfile -> psymtabs);
+ while ((*prev_pst) != NULL)
+ prev_pst = &((*prev_pst) -> next);
+ (*prev_pst) = psymtab;
+ }
+#endif
return (psymtab);
}
+void
+discard_psymtab (pst)
+ struct partial_symtab *pst;
+{
+ struct partial_symtab **prev_pst;
+
+ /* From dbxread.c:
+ Empty psymtabs happen as a result of header files which don't
+ have any symbols in them. There can be a lot of them. But this
+ check is wrong, in that a psymtab with N_SLINE entries but
+ nothing else is not empty, but we don't realize that. Fixing
+ that without slowing things down might be tricky. */
+
+ /* First, snip it out of the psymtab chain */
+
+ prev_pst = &(pst->objfile->psymtabs);
+ while ((*prev_pst) != pst)
+ prev_pst = &((*prev_pst)->next);
+ (*prev_pst) = pst->next;
+
+ /* Next, put it on a free list for recycling */
+
+ pst->next = pst->objfile->free_psymtabs;
+ pst->objfile->free_psymtabs = pst;
+}
+
\f
/* Reset all data structures in gdb which may contain references to symbol
- table date. */
+ table data. */
void
clear_symtab_users ()
set_default_breakpoint (0, 0, 0, 0);
current_source_symtab = 0;
current_source_line = 0;
+ clear_pc_function_cache ();
+ target_new_objfile (NULL);
}
/* clear_symtab_users_once:
struct section_offsets *section_offsets;
char *filename;
CORE_ADDR textlow;
- struct partial_symbol *global_syms;
- struct partial_symbol *static_syms;
+ struct partial_symbol **global_syms;
+ struct partial_symbol **static_syms;
{
struct partial_symtab *psymtab;
return (psymtab);
}
\f
-/* Debugging versions of functions that are usually inline macros
- (see symfile.h). */
-
-#if !INLINE_ADD_PSYMBOL
-
/* Add a symbol with a long value to a psymtab.
Since one arg is a struct, we pass in a ptr and deref it (sigh). */
void
-add_psymbol_to_list (name, namelength, namespace, class, list, val, language,
- objfile)
+add_psymbol_to_list (name, namelength, namespace, class, list, val, coreaddr,
+ language, objfile)
char *name;
int namelength;
- enum namespace namespace;
+ namespace_enum namespace;
enum address_class class;
struct psymbol_allocation_list *list;
- long val;
+ long val; /* Value as a long */
+ CORE_ADDR coreaddr; /* Value as a CORE_ADDR */
enum language language;
struct objfile *objfile;
{
register struct partial_symbol *psym;
- register char *demangled_name;
+ char *buf = alloca (namelength + 1);
+ /* psymbol is static so that there will be no uninitialized gaps in the
+ structure which might contain random data, causing cache misses in
+ bcache. */
+ static struct partial_symbol psymbol;
+
+ /* Create local copy of the partial symbol */
+ memcpy (buf, name, namelength);
+ buf[namelength] = '\0';
+ SYMBOL_NAME (&psymbol) = bcache (buf, namelength + 1, &objfile->psymbol_cache);
+ /* val and coreaddr are mutually exclusive, one of them *will* be zero */
+ if (val != 0)
+ {
+ SYMBOL_VALUE (&psymbol) = val;
+ }
+ else
+ {
+ SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr;
+ }
+ SYMBOL_SECTION (&psymbol) = 0;
+ SYMBOL_LANGUAGE (&psymbol) = language;
+ PSYMBOL_NAMESPACE (&psymbol) = namespace;
+ PSYMBOL_CLASS (&psymbol) = class;
+ SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol, language);
+
+ /* Stash the partial symbol away in the cache */
+ psym = bcache (&psymbol, sizeof (struct partial_symbol), &objfile->psymbol_cache);
+ /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
if (list->next >= list->list + list->size)
{
- extend_psymbol_list (list,objfile);
+ extend_psymbol_list (list, objfile);
}
- psym = list->next++;
-
- SYMBOL_NAME (psym) =
- (char *) obstack_alloc (&objfile->psymbol_obstack, namelength + 1);
- memcpy (SYMBOL_NAME (psym), name, namelength);
- SYMBOL_NAME (psym)[namelength] = '\0';
- SYMBOL_VALUE (psym) = val;
- SYMBOL_LANGUAGE (psym) = language;
- PSYMBOL_NAMESPACE (psym) = namespace;
- PSYMBOL_CLASS (psym) = class;
- SYMBOL_INIT_DEMANGLED_NAME (psym, &objfile->psymbol_obstack);
+ *list->next++ = psym;
+ OBJSTAT (objfile, n_psyms++);
}
-/* Add a symbol with a CORE_ADDR value to a psymtab. */
+/* Add a symbol with a long value to a psymtab. This differs from
+ * add_psymbol_to_list above in taking both a mangled and a demangled
+ * name. */
void
-add_psymbol_addr_to_list (name, namelength, namespace, class, list, val,
- language, objfile)
+add_psymbol_with_dem_name_to_list (name, namelength, dem_name, dem_namelength,
+ namespace, class, list, val, coreaddr, language, objfile)
char *name;
int namelength;
- enum namespace namespace;
+ char *dem_name;
+ int dem_namelength;
+ namespace_enum namespace;
enum address_class class;
struct psymbol_allocation_list *list;
- CORE_ADDR val;
+ long val; /* Value as a long */
+ CORE_ADDR coreaddr; /* Value as a CORE_ADDR */
enum language language;
struct objfile *objfile;
{
register struct partial_symbol *psym;
- register char *demangled_name;
+ char *buf = alloca (namelength + 1);
+ /* psymbol is static so that there will be no uninitialized gaps in the
+ structure which might contain random data, causing cache misses in
+ bcache. */
+ static struct partial_symbol psymbol;
+
+ /* Create local copy of the partial symbol */
+
+ memcpy (buf, name, namelength);
+ buf[namelength] = '\0';
+ SYMBOL_NAME (&psymbol) = bcache (buf, namelength + 1, &objfile->psymbol_cache);
+
+ buf = alloca (dem_namelength + 1);
+ memcpy (buf, dem_name, dem_namelength);
+ buf[dem_namelength] = '\0';
+
+ switch (language)
+ {
+ case language_c:
+ case language_cplus:
+ SYMBOL_CPLUS_DEMANGLED_NAME (&psymbol) =
+ bcache (buf, dem_namelength + 1, &objfile->psymbol_cache);
+ break;
+ case language_chill:
+ SYMBOL_CHILL_DEMANGLED_NAME (&psymbol) =
+ bcache (buf, dem_namelength + 1, &objfile->psymbol_cache);
+
+ /* FIXME What should be done for the default case? Ignoring for now. */
+ }
+
+ /* val and coreaddr are mutually exclusive, one of them *will* be zero */
+ if (val != 0)
+ {
+ SYMBOL_VALUE (&psymbol) = val;
+ }
+ else
+ {
+ SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr;
+ }
+ SYMBOL_SECTION (&psymbol) = 0;
+ SYMBOL_LANGUAGE (&psymbol) = language;
+ PSYMBOL_NAMESPACE (&psymbol) = namespace;
+ PSYMBOL_CLASS (&psymbol) = class;
+ SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol, language);
+
+ /* Stash the partial symbol away in the cache */
+ psym = bcache (&psymbol, sizeof (struct partial_symbol), &objfile->psymbol_cache);
+ /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
if (list->next >= list->list + list->size)
{
- extend_psymbol_list (list,objfile);
+ extend_psymbol_list (list, objfile);
}
- psym = list->next++;
+ *list->next++ = psym;
+ OBJSTAT (objfile, n_psyms++);
+}
+
+/* Initialize storage for partial symbols. */
+
+void
+init_psymbol_list (objfile, total_symbols)
+ struct objfile *objfile;
+ int total_symbols;
+{
+ /* Free any previously allocated psymbol lists. */
+
+ if (objfile -> global_psymbols.list)
+ {
+ mfree (objfile -> md, (PTR)objfile -> global_psymbols.list);
+ }
+ if (objfile -> static_psymbols.list)
+ {
+ mfree (objfile -> md, (PTR)objfile -> static_psymbols.list);
+ }
+
+ /* Current best guess is that approximately a twentieth
+ of the total symbols (in a debugging file) are global or static
+ oriented symbols */
- SYMBOL_NAME (psym) =
- (char *) obstack_alloc (&objfile->psymbol_obstack, namelength + 1);
- memcpy (SYMBOL_NAME (psym), name, namelength);
- SYMBOL_NAME (psym)[namelength] = '\0';
- SYMBOL_VALUE_ADDRESS (psym) = val;
- SYMBOL_LANGUAGE (psym) = language;
- PSYMBOL_NAMESPACE (psym) = namespace;
- PSYMBOL_CLASS (psym) = class;
- SYMBOL_INIT_DEMANGLED_NAME (psym, &objfile->psymbol_obstack);
+ objfile -> global_psymbols.size = total_symbols / 10;
+ objfile -> static_psymbols.size = total_symbols / 10;
+
+ if (objfile -> global_psymbols.size > 0)
+ {
+ objfile -> global_psymbols.next =
+ objfile -> global_psymbols.list = (struct partial_symbol **)
+ xmmalloc (objfile -> md, (objfile -> global_psymbols.size
+ * sizeof (struct partial_symbol *)));
+ }
+ if (objfile -> static_psymbols.size > 0)
+ {
+ objfile -> static_psymbols.next =
+ objfile -> static_psymbols.list = (struct partial_symbol **)
+ xmmalloc (objfile -> md, (objfile -> static_psymbols.size
+ * sizeof (struct partial_symbol *)));
+ }
+}
+
+/* OVERLAYS:
+ The following code implements an abstraction for debugging overlay sections.
+
+ The target model is as follows:
+ 1) The gnu linker will permit multiple sections to be mapped into the
+ same VMA, each with its own unique LMA (or load address).
+ 2) It is assumed that some runtime mechanism exists for mapping the
+ sections, one by one, from the load address into the VMA address.
+ 3) This code provides a mechanism for gdb to keep track of which
+ sections should be considered to be mapped from the VMA to the LMA.
+ This information is used for symbol lookup, and memory read/write.
+ For instance, if a section has been mapped then its contents
+ should be read from the VMA, otherwise from the LMA.
+
+ Two levels of debugger support for overlays are available. One is
+ "manual", in which the debugger relies on the user to tell it which
+ overlays are currently mapped. This level of support is
+ implemented entirely in the core debugger, and the information about
+ whether a section is mapped is kept in the objfile->obj_section table.
+
+ The second level of support is "automatic", and is only available if
+ the target-specific code provides functionality to read the target's
+ overlay mapping table, and translate its contents for the debugger
+ (by updating the mapped state information in the obj_section tables).
+
+ The interface is as follows:
+ User commands:
+ overlay map <name> -- tell gdb to consider this section mapped
+ overlay unmap <name> -- tell gdb to consider this section unmapped
+ overlay list -- list the sections that GDB thinks are mapped
+ overlay read-target -- get the target's state of what's mapped
+ overlay off/manual/auto -- set overlay debugging state
+ Functional interface:
+ find_pc_mapped_section(pc): if the pc is in the range of a mapped
+ section, return that section.
+ find_pc_overlay(pc): find any overlay section that contains
+ the pc, either in its VMA or its LMA
+ overlay_is_mapped(sect): true if overlay is marked as mapped
+ section_is_overlay(sect): true if section's VMA != LMA
+ pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
+ pc_in_unmapped_range(...): true if pc belongs to section's LMA
+ overlay_mapped_address(...): map an address from section's LMA to VMA
+ overlay_unmapped_address(...): map an address from section's VMA to LMA
+ symbol_overlayed_address(...): Return a "current" address for symbol:
+ either in VMA or LMA depending on whether
+ the symbol's section is currently mapped
+ */
+
+/* Overlay debugging state: */
+
+int overlay_debugging = 0; /* 0 == off, 1 == manual, -1 == auto */
+int overlay_cache_invalid = 0; /* True if need to refresh mapped state */
+
+/* Target vector for refreshing overlay mapped state */
+static void simple_overlay_update PARAMS ((struct obj_section *));
+void (*target_overlay_update) PARAMS ((struct obj_section *))
+ = simple_overlay_update;
+
+/* Function: section_is_overlay (SECTION)
+ Returns true if SECTION has VMA not equal to LMA, ie.
+ SECTION is loaded at an address different from where it will "run". */
+
+int
+section_is_overlay (section)
+ asection *section;
+{
+ if (overlay_debugging)
+ if (section && section->lma != 0 &&
+ section->vma != section->lma)
+ return 1;
+
+ return 0;
+}
+
+/* Function: overlay_invalidate_all (void)
+ Invalidate the mapped state of all overlay sections (mark it as stale). */
+
+static void
+overlay_invalidate_all ()
+{
+ struct objfile *objfile;
+ struct obj_section *sect;
+
+ ALL_OBJSECTIONS (objfile, sect)
+ if (section_is_overlay (sect->the_bfd_section))
+ sect->ovly_mapped = -1;
+}
+
+/* Function: overlay_is_mapped (SECTION)
+ Returns true if section is an overlay, and is currently mapped.
+ Private: public access is thru function section_is_mapped.
+
+ Access to the ovly_mapped flag is restricted to this function, so
+ that we can do automatic update. If the global flag
+ OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
+ overlay_invalidate_all. If the mapped state of the particular
+ section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
+
+static int
+overlay_is_mapped (osect)
+ struct obj_section *osect;
+{
+ if (osect == 0 || !section_is_overlay (osect->the_bfd_section))
+ return 0;
+
+ switch (overlay_debugging)
+ {
+ default:
+ case 0: return 0; /* overlay debugging off */
+ case -1: /* overlay debugging automatic */
+ /* Unles there is a target_overlay_update function,
+ there's really nothing useful to do here (can't really go auto) */
+ if (target_overlay_update)
+ {
+ if (overlay_cache_invalid)
+ {
+ overlay_invalidate_all ();
+ overlay_cache_invalid = 0;
+ }
+ if (osect->ovly_mapped == -1)
+ (*target_overlay_update) (osect);
+ }
+ /* fall thru to manual case */
+ case 1: /* overlay debugging manual */
+ return osect->ovly_mapped == 1;
+ }
+}
+
+/* Function: section_is_mapped
+ Returns true if section is an overlay, and is currently mapped. */
+
+int
+section_is_mapped (section)
+ asection *section;
+{
+ struct objfile *objfile;
+ struct obj_section *osect;
+
+ if (overlay_debugging)
+ if (section && section_is_overlay (section))
+ ALL_OBJSECTIONS (objfile, osect)
+ if (osect->the_bfd_section == section)
+ return overlay_is_mapped (osect);
+
+ return 0;
+}
+
+/* Function: pc_in_unmapped_range
+ If PC falls into the lma range of SECTION, return true, else false. */
+
+CORE_ADDR
+pc_in_unmapped_range (pc, section)
+ CORE_ADDR pc;
+ asection *section;
+{
+ int size;
+
+ if (overlay_debugging)
+ if (section && section_is_overlay (section))
+ {
+ size = bfd_get_section_size_before_reloc (section);
+ if (section->lma <= pc && pc < section->lma + size)
+ return 1;
+ }
+ return 0;
+}
+
+/* Function: pc_in_mapped_range
+ If PC falls into the vma range of SECTION, return true, else false. */
+
+CORE_ADDR
+pc_in_mapped_range (pc, section)
+ CORE_ADDR pc;
+ asection *section;
+{
+ int size;
+
+ if (overlay_debugging)
+ if (section && section_is_overlay (section))
+ {
+ size = bfd_get_section_size_before_reloc (section);
+ if (section->vma <= pc && pc < section->vma + size)
+ return 1;
+ }
+ return 0;
+}
+
+/* Function: overlay_unmapped_address (PC, SECTION)
+ Returns the address corresponding to PC in the unmapped (load) range.
+ May be the same as PC. */
+
+CORE_ADDR
+overlay_unmapped_address (pc, section)
+ CORE_ADDR pc;
+ asection *section;
+{
+ if (overlay_debugging)
+ if (section && section_is_overlay (section) &&
+ pc_in_mapped_range (pc, section))
+ return pc + section->lma - section->vma;
+
+ return pc;
+}
+
+/* Function: overlay_mapped_address (PC, SECTION)
+ Returns the address corresponding to PC in the mapped (runtime) range.
+ May be the same as PC. */
+
+CORE_ADDR
+overlay_mapped_address (pc, section)
+ CORE_ADDR pc;
+ asection *section;
+{
+ if (overlay_debugging)
+ if (section && section_is_overlay (section) &&
+ pc_in_unmapped_range (pc, section))
+ return pc + section->vma - section->lma;
+
+ return pc;
+}
+
+
+/* Function: symbol_overlayed_address
+ Return one of two addresses (relative to the VMA or to the LMA),
+ depending on whether the section is mapped or not. */
+
+CORE_ADDR
+symbol_overlayed_address (address, section)
+ CORE_ADDR address;
+ asection *section;
+{
+ if (overlay_debugging)
+ {
+ /* If the symbol has no section, just return its regular address. */
+ if (section == 0)
+ return address;
+ /* If the symbol's section is not an overlay, just return its address */
+ if (!section_is_overlay (section))
+ return address;
+ /* If the symbol's section is mapped, just return its address */
+ if (section_is_mapped (section))
+ return address;
+ /*
+ * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
+ * then return its LOADED address rather than its vma address!!
+ */
+ return overlay_unmapped_address (address, section);
+ }
+ return address;
+}
+
+/* Function: find_pc_overlay (PC)
+ Return the best-match overlay section for PC:
+ If PC matches a mapped overlay section's VMA, return that section.
+ Else if PC matches an unmapped section's VMA, return that section.
+ Else if PC matches an unmapped section's LMA, return that section. */
+
+asection *
+find_pc_overlay (pc)
+ CORE_ADDR pc;
+{
+ struct objfile *objfile;
+ struct obj_section *osect, *best_match = NULL;
+
+ if (overlay_debugging)
+ ALL_OBJSECTIONS (objfile, osect)
+ if (section_is_overlay (osect->the_bfd_section))
+ {
+ if (pc_in_mapped_range (pc, osect->the_bfd_section))
+ {
+ if (overlay_is_mapped (osect))
+ return osect->the_bfd_section;
+ else
+ best_match = osect;
+ }
+ else if (pc_in_unmapped_range (pc, osect->the_bfd_section))
+ best_match = osect;
+ }
+ return best_match ? best_match->the_bfd_section : NULL;
+}
+
+/* Function: find_pc_mapped_section (PC)
+ If PC falls into the VMA address range of an overlay section that is
+ currently marked as MAPPED, return that section. Else return NULL. */
+
+asection *
+find_pc_mapped_section (pc)
+ CORE_ADDR pc;
+{
+ struct objfile *objfile;
+ struct obj_section *osect;
+
+ if (overlay_debugging)
+ ALL_OBJSECTIONS (objfile, osect)
+ if (pc_in_mapped_range (pc, osect->the_bfd_section) &&
+ overlay_is_mapped (osect))
+ return osect->the_bfd_section;
+
+ return NULL;
+}
+
+/* Function: list_overlays_command
+ Print a list of mapped sections and their PC ranges */
+
+void
+list_overlays_command (args, from_tty)
+ char *args;
+ int from_tty;
+{
+ int nmapped = 0;
+ struct objfile *objfile;
+ struct obj_section *osect;
+
+ if (overlay_debugging)
+ ALL_OBJSECTIONS (objfile, osect)
+ if (overlay_is_mapped (osect))
+ {
+ const char *name;
+ bfd_vma lma, vma;
+ int size;
+
+ vma = bfd_section_vma (objfile->obfd, osect->the_bfd_section);
+ lma = bfd_section_lma (objfile->obfd, osect->the_bfd_section);
+ size = bfd_get_section_size_before_reloc (osect->the_bfd_section);
+ name = bfd_section_name (objfile->obfd, osect->the_bfd_section);
+
+ printf_filtered ("Section %s, loaded at ", name);
+ print_address_numeric (lma, 1, stdout);
+ puts_filtered (" - ");
+ print_address_numeric (lma + size, 1, stdout);
+ printf_filtered (", mapped at ");
+ print_address_numeric (vma, 1, stdout);
+ puts_filtered (" - ");
+ print_address_numeric (vma + size, 1, stdout);
+ puts_filtered ("\n");
+
+ nmapped ++;
+ }
+ if (nmapped == 0)
+ printf_filtered ("No sections are mapped.\n");
+}
+
+/* Function: map_overlay_command
+ Mark the named section as mapped (ie. residing at its VMA address). */
+
+void
+map_overlay_command (args, from_tty)
+ char *args;
+ int from_tty;
+{
+ struct objfile *objfile, *objfile2;
+ struct obj_section *sec, *sec2;
+ asection *bfdsec;
+
+ if (!overlay_debugging)
+ error ("Overlay debugging not enabled. Use the 'OVERLAY ON' command.");
+
+ if (args == 0 || *args == 0)
+ error ("Argument required: name of an overlay section");
+
+ /* First, find a section matching the user supplied argument */
+ ALL_OBJSECTIONS (objfile, sec)
+ if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
+ {
+ /* Now, check to see if the section is an overlay. */
+ bfdsec = sec->the_bfd_section;
+ if (!section_is_overlay (bfdsec))
+ continue; /* not an overlay section */
+
+ /* Mark the overlay as "mapped" */
+ sec->ovly_mapped = 1;
+
+ /* Next, make a pass and unmap any sections that are
+ overlapped by this new section: */
+ ALL_OBJSECTIONS (objfile2, sec2)
+ if (sec2->ovly_mapped &&
+ sec != sec2 &&
+ sec->the_bfd_section != sec2->the_bfd_section &&
+ (pc_in_mapped_range (sec2->addr, sec->the_bfd_section) ||
+ pc_in_mapped_range (sec2->endaddr, sec->the_bfd_section)))
+ {
+ if (info_verbose)
+ printf_filtered ("Note: section %s unmapped by overlap\n",
+ bfd_section_name (objfile->obfd,
+ sec2->the_bfd_section));
+ sec2->ovly_mapped = 0; /* sec2 overlaps sec: unmap sec2 */
+ }
+ return;
+ }
+ error ("No overlay section called %s", args);
+}
+
+/* Function: unmap_overlay_command
+ Mark the overlay section as unmapped
+ (ie. resident in its LMA address range, rather than the VMA range). */
+
+void
+unmap_overlay_command (args, from_tty)
+ char *args;
+ int from_tty;
+{
+ struct objfile *objfile;
+ struct obj_section *sec;
+
+ if (!overlay_debugging)
+ error ("Overlay debugging not enabled. Use the 'OVERLAY ON' command.");
+
+ if (args == 0 || *args == 0)
+ error ("Argument required: name of an overlay section");
+
+ /* First, find a section matching the user supplied argument */
+ ALL_OBJSECTIONS (objfile, sec)
+ if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
+ {
+ if (!sec->ovly_mapped)
+ error ("Section %s is not mapped", args);
+ sec->ovly_mapped = 0;
+ return;
+ }
+ error ("No overlay section called %s", args);
+}
+
+/* Function: overlay_auto_command
+ A utility command to turn on overlay debugging.
+ Possibly this should be done via a set/show command. */
+
+static void
+overlay_auto_command (args, from_tty)
+ char *args;
+ int from_tty;
+{
+ overlay_debugging = -1;
+ if (info_verbose)
+ printf_filtered ("Automatic overlay debugging enabled.");
+}
+
+/* Function: overlay_manual_command
+ A utility command to turn on overlay debugging.
+ Possibly this should be done via a set/show command. */
+
+static void
+overlay_manual_command (args, from_tty)
+ char *args;
+ int from_tty;
+{
+ overlay_debugging = 1;
+ if (info_verbose)
+ printf_filtered ("Overlay debugging enabled.");
+}
+
+/* Function: overlay_off_command
+ A utility command to turn on overlay debugging.
+ Possibly this should be done via a set/show command. */
+
+static void
+overlay_off_command (args, from_tty)
+ char *args;
+ int from_tty;
+{
+ overlay_debugging = 0;
+ if (info_verbose)
+ printf_filtered ("Overlay debugging disabled.");
+}
+
+static void
+overlay_load_command (args, from_tty)
+ char *args;
+ int from_tty;
+{
+ if (target_overlay_update)
+ (*target_overlay_update) (NULL);
+ else
+ error ("This target does not know how to read its overlay state.");
+}
+
+/* Function: overlay_command
+ A place-holder for a mis-typed command */
+
+/* Command list chain containing all defined "overlay" subcommands. */
+struct cmd_list_element *overlaylist;
+
+static void
+overlay_command (args, from_tty)
+ char *args;
+ int from_tty;
+{
+ printf_unfiltered
+ ("\"overlay\" must be followed by the name of an overlay command.\n");
+ help_list (overlaylist, "overlay ", -1, gdb_stdout);
+}
+
+
+/* Target Overlays for the "Simplest" overlay manager:
+
+ This is GDB's default target overlay layer. It works with the
+ minimal overlay manager supplied as an example by Cygnus. The
+ entry point is via a function pointer "target_overlay_update",
+ so targets that use a different runtime overlay manager can
+ substitute their own overlay_update function and take over the
+ function pointer.
+
+ The overlay_update function pokes around in the target's data structures
+ to see what overlays are mapped, and updates GDB's overlay mapping with
+ this information.
+
+ In this simple implementation, the target data structures are as follows:
+ unsigned _novlys; /# number of overlay sections #/
+ unsigned _ovly_table[_novlys][4] = {
+ {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
+ {..., ..., ..., ...},
+ }
+ unsigned _novly_regions; /# number of overlay regions #/
+ unsigned _ovly_region_table[_novly_regions][3] = {
+ {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
+ {..., ..., ...},
+ }
+ These functions will attempt to update GDB's mappedness state in the
+ symbol section table, based on the target's mappedness state.
+
+ To do this, we keep a cached copy of the target's _ovly_table, and
+ attempt to detect when the cached copy is invalidated. The main
+ entry point is "simple_overlay_update(SECT), which looks up SECT in
+ the cached table and re-reads only the entry for that section from
+ the target (whenever possible).
+ */
+
+/* Cached, dynamically allocated copies of the target data structures: */
+static unsigned (*cache_ovly_table)[4] = 0;
+#if 0
+static unsigned (*cache_ovly_region_table)[3] = 0;
+#endif
+static unsigned cache_novlys = 0;
+#if 0
+static unsigned cache_novly_regions = 0;
+#endif
+static CORE_ADDR cache_ovly_table_base = 0;
+#if 0
+static CORE_ADDR cache_ovly_region_table_base = 0;
+#endif
+enum ovly_index { VMA, SIZE, LMA, MAPPED};
+#define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT)
+
+/* Throw away the cached copy of _ovly_table */
+static void
+simple_free_overlay_table ()
+{
+ if (cache_ovly_table)
+ free(cache_ovly_table);
+ cache_novlys = 0;
+ cache_ovly_table = NULL;
+ cache_ovly_table_base = 0;
+}
+
+#if 0
+/* Throw away the cached copy of _ovly_region_table */
+static void
+simple_free_overlay_region_table ()
+{
+ if (cache_ovly_region_table)
+ free(cache_ovly_region_table);
+ cache_novly_regions = 0;
+ cache_ovly_region_table = NULL;
+ cache_ovly_region_table_base = 0;
+}
+#endif
+
+/* Read an array of ints from the target into a local buffer.
+ Convert to host order. int LEN is number of ints */
+static void
+read_target_long_array (memaddr, myaddr, len)
+ CORE_ADDR memaddr;
+ unsigned int *myaddr;
+ int len;
+{
+ char *buf = alloca (len * TARGET_LONG_BYTES);
+ int i;
+
+ read_memory (memaddr, buf, len * TARGET_LONG_BYTES);
+ for (i = 0; i < len; i++)
+ myaddr[i] = extract_unsigned_integer (TARGET_LONG_BYTES * i + buf,
+ TARGET_LONG_BYTES);
+}
+
+/* Find and grab a copy of the target _ovly_table
+ (and _novlys, which is needed for the table's size) */
+static int
+simple_read_overlay_table ()
+{
+ struct minimal_symbol *msym;
+
+ simple_free_overlay_table ();
+ msym = lookup_minimal_symbol ("_novlys", 0, 0);
+ if (msym != NULL)
+ cache_novlys = read_memory_integer (SYMBOL_VALUE_ADDRESS (msym), 4);
+ else
+ return 0; /* failure */
+ cache_ovly_table = (void *) xmalloc (cache_novlys * sizeof(*cache_ovly_table));
+ if (cache_ovly_table != NULL)
+ {
+ msym = lookup_minimal_symbol ("_ovly_table", 0, 0);
+ if (msym != NULL)
+ {
+ cache_ovly_table_base = SYMBOL_VALUE_ADDRESS (msym);
+ read_target_long_array (cache_ovly_table_base,
+ (int *) cache_ovly_table,
+ cache_novlys * 4);
+ }
+ else
+ return 0; /* failure */
+ }
+ else
+ return 0; /* failure */
+ return 1; /* SUCCESS */
+}
+
+#if 0
+/* Find and grab a copy of the target _ovly_region_table
+ (and _novly_regions, which is needed for the table's size) */
+static int
+simple_read_overlay_region_table ()
+{
+ struct minimal_symbol *msym;
+
+ simple_free_overlay_region_table ();
+ msym = lookup_minimal_symbol ("_novly_regions", 0, 0);
+ if (msym != NULL)
+ cache_novly_regions = read_memory_integer (SYMBOL_VALUE_ADDRESS (msym), 4);
+ else
+ return 0; /* failure */
+ cache_ovly_region_table = (void *) xmalloc (cache_novly_regions * 12);
+ if (cache_ovly_region_table != NULL)
+ {
+ msym = lookup_minimal_symbol ("_ovly_region_table", 0, 0);
+ if (msym != NULL)
+ {
+ cache_ovly_region_table_base = SYMBOL_VALUE_ADDRESS (msym);
+ read_target_long_array (cache_ovly_region_table_base,
+ (int *) cache_ovly_region_table,
+ cache_novly_regions * 3);
+ }
+ else
+ return 0; /* failure */
+ }
+ else
+ return 0; /* failure */
+ return 1; /* SUCCESS */
+}
+#endif
+
+/* Function: simple_overlay_update_1
+ A helper function for simple_overlay_update. Assuming a cached copy
+ of _ovly_table exists, look through it to find an entry whose vma,
+ lma and size match those of OSECT. Re-read the entry and make sure
+ it still matches OSECT (else the table may no longer be valid).
+ Set OSECT's mapped state to match the entry. Return: 1 for
+ success, 0 for failure. */
+
+static int
+simple_overlay_update_1 (osect)
+ struct obj_section *osect;
+{
+ int i, size;
+
+ size = bfd_get_section_size_before_reloc (osect->the_bfd_section);
+ for (i = 0; i < cache_novlys; i++)
+ if (cache_ovly_table[i][VMA] == osect->the_bfd_section->vma &&
+ cache_ovly_table[i][LMA] == osect->the_bfd_section->lma /* &&
+ cache_ovly_table[i][SIZE] == size */)
+ {
+ read_target_long_array (cache_ovly_table_base + i * TARGET_LONG_BYTES,
+ (int *) cache_ovly_table[i], 4);
+ if (cache_ovly_table[i][VMA] == osect->the_bfd_section->vma &&
+ cache_ovly_table[i][LMA] == osect->the_bfd_section->lma /* &&
+ cache_ovly_table[i][SIZE] == size */)
+ {
+ osect->ovly_mapped = cache_ovly_table[i][MAPPED];
+ return 1;
+ }
+ else /* Warning! Warning! Target's ovly table has changed! */
+ return 0;
+ }
+ return 0;
+}
+
+/* Function: simple_overlay_update
+ If OSECT is NULL, then update all sections' mapped state
+ (after re-reading the entire target _ovly_table).
+ If OSECT is non-NULL, then try to find a matching entry in the
+ cached ovly_table and update only OSECT's mapped state.
+ If a cached entry can't be found or the cache isn't valid, then
+ re-read the entire cache, and go ahead and update all sections. */
+
+static void
+simple_overlay_update (osect)
+ struct obj_section *osect;
+{
+ struct objfile *objfile;
+
+ /* Were we given an osect to look up? NULL means do all of them. */
+ if (osect)
+ /* Have we got a cached copy of the target's overlay table? */
+ if (cache_ovly_table != NULL)
+ /* Does its cached location match what's currently in the symtab? */
+ if (cache_ovly_table_base ==
+ SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", 0, 0)))
+ /* Then go ahead and try to look up this single section in the cache */
+ if (simple_overlay_update_1 (osect))
+ /* Found it! We're done. */
+ return;
+
+ /* Cached table no good: need to read the entire table anew.
+ Or else we want all the sections, in which case it's actually
+ more efficient to read the whole table in one block anyway. */
+
+ if (simple_read_overlay_table () == 0) /* read failed? No table? */
+ {
+ warning ("Failed to read the target overlay mapping table.");
+ return;
+ }
+ /* Now may as well update all sections, even if only one was requested. */
+ ALL_OBJSECTIONS (objfile, osect)
+ if (section_is_overlay (osect->the_bfd_section))
+ {
+ int i, size;
+
+ size = bfd_get_section_size_before_reloc (osect->the_bfd_section);
+ for (i = 0; i < cache_novlys; i++)
+ if (cache_ovly_table[i][VMA] == osect->the_bfd_section->vma &&
+ cache_ovly_table[i][LMA] == osect->the_bfd_section->lma /* &&
+ cache_ovly_table[i][SIZE] == size */)
+ { /* obj_section matches i'th entry in ovly_table */
+ osect->ovly_mapped = cache_ovly_table[i][MAPPED];
+ break; /* finished with inner for loop: break out */
+ }
+ }
}
-#endif /* !INLINE_ADD_PSYMBOL */
-\f
void
_initialize_symfile ()
{
c->completer = filename_completer;
c = add_cmd ("add-symbol-file", class_files, add_symbol_file_command,
- "Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\
-The second argument provides the starting address of the file's text.",
+ "Usage: add-symbol-file FILE ADDR\n\
+Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\
+ADDR is the starting address of the file's text.",
&cmdlist);
c->completer = filename_completer;
+ c = add_cmd ("add-shared-symbol-files", class_files,
+ add_shared_symbol_files_command,
+ "Load the symbols from shared objects in the dynamic linker's link map.",
+ &cmdlist);
+ c = add_alias_cmd ("assf", "add-shared-symbol-files", class_files, 1,
+ &cmdlist);
+
c = add_cmd ("load", class_files, load_command,
"Dynamically load FILE into the running program, and record its symbols\n\
for access from GDB.", &cmdlist);
&setlist),
&showlist);
+ add_prefix_cmd ("overlay", class_support, overlay_command,
+ "Commands for debugging overlays.", &overlaylist,
+ "overlay ", 0, &cmdlist);
+
+ add_com_alias ("ovly", "overlay", class_alias, 1);
+ add_com_alias ("ov", "overlay", class_alias, 1);
+
+ add_cmd ("map-overlay", class_support, map_overlay_command,
+ "Assert that an overlay section is mapped.", &overlaylist);
+
+ add_cmd ("unmap-overlay", class_support, unmap_overlay_command,
+ "Assert that an overlay section is unmapped.", &overlaylist);
+
+ add_cmd ("list-overlays", class_support, list_overlays_command,
+ "List mappings of overlay sections.", &overlaylist);
+
+ add_cmd ("manual", class_support, overlay_manual_command,
+ "Enable overlay debugging.", &overlaylist);
+ add_cmd ("off", class_support, overlay_off_command,
+ "Disable overlay debugging.", &overlaylist);
+ add_cmd ("auto", class_support, overlay_auto_command,
+ "Enable automatic overlay debugging.", &overlaylist);
+ add_cmd ("load-target", class_support, overlay_load_command,
+ "Read the overlay mapping state from the target.", &overlaylist);
+
+ /* Filename extension to source language lookup table: */
+ init_filename_language_table ();
+ c = add_set_cmd ("extension-language", class_files, var_string_noescape,
+ (char *) &ext_args,
+ "Set mapping between filename extension and source language.\n\
+Usage: set extension-language .foo bar",
+ &setlist);
+ c->function.cfunc = set_ext_lang_command;
+
+ add_info ("extensions", info_ext_lang_command,
+ "All filename extensions associated with a source language.");
}
projects / thirdparty / binutils-gdb.git / blobdiff